Clarence J. LeBel

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Acknowledgements I would like first and foremost to dedicate this thesis to my father, Dr. Anthony N. Okobi, who passed away on October 11, 2005, and my maternal grandmother, Josephine M. Emodi, who passed away on August 7, 2005. Both these beautiful people were the most influential figures in my life. As a child, my grandmother fueled my curiosity and(More)
In recent years, research in human speech communication suggested that the inventory of sound units that are observed in vowels across languages is strongly influenced by the acoustic properties of the human subglottal system. That is, there is a discrete set of possible vowel features that are constrained by the interaction of the acoustic/articulatory(More)
The lateral consonant in English is generally produced with a backed tongue body, a midline closure of the tongue blade at the alveolar ridge, and a path around one or both of the lateral edges of the tongue blade. In pre-vocalic lateral consonants, the release of the closure causes a discontinuity in the spectral characteristics of the sound. Past attempts(More)
Advanced laryngeal cancer is often treated by surgical removal of the larynx (laryngectomy) thus rendering patients unable to produce normal voice and speech. Laryngectomy patients must rely on an alternative means of producing voice and speech, with the most common method being the use of an electrolarynx (EL). The EL is a small, hand-held,(More)
The author hereby grants to MIT permission to reproduce and distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Abstract In this thesis, a low-power, wearable monitoring system was developed from discrete electronic components and custom PCBs. The device was designed to(More)